发明申请
- 专利标题: SOUND AND MUSIC PLAYBACK DEVICE
- 专利标题(中): 声音和音乐播放设备
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申请号: US13014138申请日: 2011-01-26
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公开(公告)号: US20110187452A1公开(公告)日: 2011-08-04
- 发明人: Yukihiro Imai , Yukio Kadowaki , Koichi Hagino , Shunsei Tanaka
- 申请人: Yukihiro Imai , Yukio Kadowaki , Koichi Hagino , Shunsei Tanaka
- 申请人地址: JP Tokyo
- 专利权人: RICOH COMPANY, LTD.
- 当前专利权人: RICOH COMPANY, LTD.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2010-017793 20100129
- 主分类号: H03G3/20
- IPC分类号: H03G3/20
摘要:
A sound and music playback device includes: an output amplifier; a power supply circuit that supplies electric power to the output amplifier; and an output signal level judging circuit; wherein an output voltage value of the power supply circuit is changed based on a level of a sound and music signal to be outputted.
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